Raman spectroscopic and gas transport study of a pentablock ionomer complexed with metal ions and its relationship to physical properties

Yanfang Fan; Chris J. Cornelius

doi:10.1007/s10853-012-6853-9

Raman spectroscopic and gas transport study of a pentablock ionomer complexed with metal ions and its relationship to physical properties

Yanfang Fan, Chris J. Cornelius

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

A series of poly(b-(t-butyl styrene)-b-(ethylene-co-propylene)-b-(styrene- co-styrene sulfonate)-b-(ethylene-co-propylene)-b-(t-butyl styrene)) ionomers were complexed with a series of metal ions. Raman sulfonate group symmetric ν _s(SO₃ ^-) and asymmetric ν _as(SO₃ ^-) stretching modes at 1031 and 1127 cm^-1 were proportional to ion-exchange capacity. Mono and divalent counter-ions of Li⁺, Na⁺, K⁺, and Ca ²⁺ affected the stretching modes of ν(SO₃ ^-) due to ion size and charge. The gas permeability P and diffusivity D of O ₂, CO₂, N₂, and CH₄ decreased with increasing complexation strength between sulfonate group and metal ion. Solubility S was a maximum for ionomers complexed with K⁺ and CO ₂, but small changes were observed for other metal ions. Overall, these results suggest that ionomers coordinated with different metal ions influence network physical properties, chain mobility, and gas transport.

Original language	English (US)
Pages (from-to)	1153-1161
Number of pages	9
Journal	Journal of Materials Science
Volume	48
Issue number	3
DOIs	https://doi.org/10.1007/s10853-012-6853-9
State	Published - Feb 2013
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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title = "Raman spectroscopic and gas transport study of a pentablock ionomer complexed with metal ions and its relationship to physical properties",

abstract = "A series of poly(b-(t-butyl styrene)-b-(ethylene-co-propylene)-b-(styrene- co-styrene sulfonate)-b-(ethylene-co-propylene)-b-(t-butyl styrene)) ionomers were complexed with a series of metal ions. Raman sulfonate group symmetric ν s(SO3 -) and asymmetric ν as(SO3 -) stretching modes at 1031 and 1127 cm-1 were proportional to ion-exchange capacity. Mono and divalent counter-ions of Li+, Na+, K+, and Ca 2+ affected the stretching modes of ν(SO3 -) due to ion size and charge. The gas permeability P and diffusivity D of O 2, CO2, N2, and CH4 decreased with increasing complexation strength between sulfonate group and metal ion. Solubility S was a maximum for ionomers complexed with K+ and CO 2, but small changes were observed for other metal ions. Overall, these results suggest that ionomers coordinated with different metal ions influence network physical properties, chain mobility, and gas transport.",

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T1 - Raman spectroscopic and gas transport study of a pentablock ionomer complexed with metal ions and its relationship to physical properties

AU - Fan, Yanfang

AU - Cornelius, Chris J.

PY - 2013/2

Y1 - 2013/2

N2 - A series of poly(b-(t-butyl styrene)-b-(ethylene-co-propylene)-b-(styrene- co-styrene sulfonate)-b-(ethylene-co-propylene)-b-(t-butyl styrene)) ionomers were complexed with a series of metal ions. Raman sulfonate group symmetric ν s(SO3 -) and asymmetric ν as(SO3 -) stretching modes at 1031 and 1127 cm-1 were proportional to ion-exchange capacity. Mono and divalent counter-ions of Li+, Na+, K+, and Ca 2+ affected the stretching modes of ν(SO3 -) due to ion size and charge. The gas permeability P and diffusivity D of O 2, CO2, N2, and CH4 decreased with increasing complexation strength between sulfonate group and metal ion. Solubility S was a maximum for ionomers complexed with K+ and CO 2, but small changes were observed for other metal ions. Overall, these results suggest that ionomers coordinated with different metal ions influence network physical properties, chain mobility, and gas transport.

AB - A series of poly(b-(t-butyl styrene)-b-(ethylene-co-propylene)-b-(styrene- co-styrene sulfonate)-b-(ethylene-co-propylene)-b-(t-butyl styrene)) ionomers were complexed with a series of metal ions. Raman sulfonate group symmetric ν s(SO3 -) and asymmetric ν as(SO3 -) stretching modes at 1031 and 1127 cm-1 were proportional to ion-exchange capacity. Mono and divalent counter-ions of Li+, Na+, K+, and Ca 2+ affected the stretching modes of ν(SO3 -) due to ion size and charge. The gas permeability P and diffusivity D of O 2, CO2, N2, and CH4 decreased with increasing complexation strength between sulfonate group and metal ion. Solubility S was a maximum for ionomers complexed with K+ and CO 2, but small changes were observed for other metal ions. Overall, these results suggest that ionomers coordinated with different metal ions influence network physical properties, chain mobility, and gas transport.

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Raman spectroscopic and gas transport study of a pentablock ionomer complexed with metal ions and its relationship to physical properties

Abstract

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